Pump.



C. R. EDWARDS.

PUMP.A

APBLIOATION FILED ML2, 191s.

1 w0841,41 3, Patented Jan. 13, 1914.

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wal/11214411207 WTNESSES .cuantas n. EDWARDS, or PEKIN, :minors PUMP.

Specification of Letters Patent.

Application led April 2, 1913. Serial No. 758,378.

To all whom it may concern Be it kno-wn that I, CHARLES R. EDWARDS, a citizen of the United States, residing at Pekin, in county of Tazewell and State of Illinois, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

My invention relates to an improvement in pumps, and more particularly to such devices of the double-acting or force-pump type in which a constant stream iiows at the outlet.

The object of this inventionis to produce a pump which may be used in elevating water or other liquids, and which is simple and eicient in its operation.

This invention relates to still other novel features of construction and combinations of parts which will be hereinafter described and set forth in the claims.

In the accompanying drawings Figure 1 is a view in vertical section to show the arrangement andl assembling of the parts; Fig. 2 is an enlarged transverse sectional View on the line 2-2 of Fig. 1; Fig. 3 is a view in top plan of the piston rod guide,

and Fig. 4Cis a detail bottom plan view to better illustrate the form of one of the,

valves.

The cylinder A has the piston B mounted to reciprocate therein, and this piston has the packing washers 1 and 2 so connected therewith that a liquid-tight connection is formed between the piston and the inner wall of the cylinder on'both the up and down,strokes. The pist/on ro-d 3 is secured to the piston, and extends up through the cylinder and through a guide 4 held-posi tioned in the cylinder near the upper end thereof. Near the bottom of the cylinder A a plug 5 is held by being screwed into the cylinder or in any other approved manner. This plug is open at its center at 6, and a valve 7 is received in the opening .to permit the passage of liquid up through the opening and to close the opening tothe passage of liquid in a downward direction.

A branch pipe C is formed integral with the cylinder A, and an opening 8 establishes communication between the cylinder A to a y point above the guide 4, where communication is again established with the interior of the cylinder through an opening 9.- A

plug 10 is screwed -or otherwise held in the branch C above the-opening 8, and this plug has a central opening 11. A valve 12 is mounted in the opening to permit the passage of liquid from the opening 8 to the body of the branch C, and to close the opening to the back flow of liquid in a downward direction. A plug 13' closesl the branch C at the lower end, and communication with the passage'is thus limited .to-the opening 8 from the cylinder and the opening 9 into the cylinder. l

A Hap valve 14 iis-held-inan'opening 15 Patented Jan. 13, 1914.

formed through the wall of the cylinder at Aa point below the guide 4, and, as kbetter shown in Fig. 2, this flap valve is constructed to Swingin, and thus li uid can pass into the cylinder A through t e opening 15, but the passage from the cylinder through this opening is precluded by the lvalve 14.

The guide4 4 has af central opening 16 through which'the piston rod 3 has sliding -movement,and slot c nings17, 17 are provided through thel'gulde aroundthe openin 16. A valve washer 18 is received aroun the shank-19 of the guideli, and is adapted to fit normally over and close the-slotted openings 17. A valve 18 is held in its closed position by a coiled spring 20, which is received around the shank 19 and is held by pins 21.

It is vthe intention that the structure as described be submerged in the liquid to be elevated, but if desired, a pipe22 maybe carried from the lower end of the cylinder A to the liquid and a similar pipe can be fitted to supply the liquid to the opening 15. In this way, the pump structure can be set at any point. v

The flow of the liquid pumped is through the opening 23, and it is evident that the liquid might be carried to any distance by a pipe which can be screwed in the screw threads 24.

The operation of the pump is as follows:

vThe piston is moved on its upward stroke to the position shown in Fig. l. The liquid is drawn up through the opening 6, and fills the cylinder below the npiston. The piston is then moved in a downward directlon, and the liquid is forced up through the opening 11 1n the plug 10, but isheld in the branch C. At the Sametime liquid is drawn into the cylinder above the piston through y the opening 15. The piston 1s again moved in the upward path and the liquid in the upper part of the cylinderV is expelled through the slotted openings 17. This op- -eration is continued, and the liquid in the body of the branch C and in the cylinder A above the guide 4 is forced out through th opening 23 in a constant stream. I

It is evident that slight changes might be made in the form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not wish to limit myself to the exact description herein. set forth, but- Having fully described my invention, what v I claim as new and desire to 'secure by Letters Patent is:

l. A pump comprising a, cylinder, a piston mounted to be reciprocated in said cylinder, a piston rod connected to and for reciprocating said piston, a guide located in the upper part of the cylinder through which said piston rod has endwise movement, an intake valve located in the lower part of the cylinder, a branch formed from the cylinder and connecting therewith at its lower end at a point above said valve and atv its upper end at a point above the guide, an intake valve located in the branch above the o ening from the cylinder, an'intake valve ocated in the upper part of the cylinder below the guide, saidguide provided with o nings through which the liquid passes rom the lower to the upper side, and a valve received around the guide to normally fit over and close said opening..

2. A pump comprising a cylinder, a double-acting piston received in the c linder, a piston rod connected with said piston located in the opening to permit the passage of liquid upwardly therethrough and to close the passage to liquid moving in a downward direction, a branch connecting with the cylinder at its lower end above the plug and at its upper end above the guide, a plug provided with a passage therethrough secured in the branch above the opening from the cylinder, a valve located in the passage to permit the passage of liquid in an upward direction and to close the passage to the back ow of the liquid, an .inlet valve located in the upper part of the cylinder below the guide, said guide provided with openings through which the liquid may pass, a valve received around the guide to lit over said openings, and resilient means for holding the valve normally in a position that the liquid can pass in an u ward direction, but is prevented from owing in a downward direction.

In testimony whereof I affix my signature, in the presence of two witnesses.

CHARLES n. EDWARDS.

Witnesses:

ALYCE Fnonn, T. N. SMITH. 

